Back belt



FIG. 1 is a front perspective view of a back belt;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a right side view thereof (the left side view is a mirror image thereof). 

The ornamental design for a back belt, as shown and described. 